PROBLEM TO BE SOLVED: To provide a liver function-improving agent, wherein the agent contains substances which can improve a liver function, and is useful for the prevention and/or treatment of hepatic disease and hepatic dysfunction.SOLUTION: The present invention provides a liver function-improving agent, the agent containing maltitol as an active ingredient.【課題】肝疾患ないし肝機能障害の予防および/または治療に有用な、肝機能を改善し得る物質を含む肝機能改善剤を提供すること。【解決手段】マルチトールを有効成分として含有する肝機能改善剤を提供する。【選択図】なし